Unraveling the magnetic softness in Fe–Ni–B-based nanocrystalline material by magnetic small-angle neutron scattering

Bersweiler, M.; Adams, M.P.; Peral, I.; Kohlbrecher, J.; Suzuki, K.; Michels, A.

doi:10.1107/S2052252521010605

Figure 4
Experimental 2D total (nuclear + magnetic) SANS cross section dΣ/dΩ of (Fe_0.7Ni_0.3)₈₆B₁₄ alloy at the selected fields 7.99, 2.99, 0.59, 0.29 T (upper row), and the corresponding purely magnetic SANS cross section dΣ_mag/dΩ (middle row). Experimental dΣ_mag/dΩ were obtained by subtracting dΣ/dΩ at the (near-) saturation field of 7.99 T from the data at the lower fields. The applied (internal) magnetic field H_i is horizontal in the plane of the detector $[({\bf H}_{\rm i}\perp {\bf k}_0)]$ . Lower row: computed dΣ_mag/dΩ based on the micromagnetic SANS theory [Equations (5)–(9)] at the same selected field values as above, and using the experimental parameters given in Table 1